
y1 = [1680, 1540, 1440, 1440, 1460, 1460, 1500, 1480, 1520, 1520, 1520, 1540, 1540, 1560, 1580, 1560, 1560, 1580, 1600, 1580, 1600, ];
x = 0:0.1:2;
plot(x, y1, 'r*')

title('min. attack to fail all');
xlabel('\beta');
box on
daspect([0.03 10 1]);